Think a black background for your mac

I usually have a ton of windows open on my mac at once. Accordance has this 3 pane floating window style that makes it hard to focus on if I have multiple windows open in the background. They all tend to blend together. I installed this free app called Think. It places a black or any color you want back ground behind whatever window you want to call up. With Accordance this really helps me visually focus on what Im doing and I can still keep the other windows open and easily call them forward when i want. Its pretty slick.Heres a screenshot for an example.